Actually I didn't read the testing sources. However, are the links to the math.pdf broken? (Perhaps it's just me, who cannot download this pdf right now. Or I just have a bad day ...)
The link from the HTML docs takes you to a download from SVN - it's really slow to open in your browser, but I just tried it and it worked for me - you might be better to right click and select "Save File" etc, or else as Paul says, get the full Boost PDF build from sourceforge.
The solution: I did indeed make a most stupid mistake: When you miscalculate N, the distribution you compare against is wrong and in the extreme, you get only zeros back (which happend to me). Arrgh! *headbang* ;-)
Happens to us all ;-) BTW if you're trying to do something that isn't covered by the existing tutorials, get back to us and hopefully one day something extra can get added! Cheers, John.